Benchmark: Array concat vs spread operator vs push - V2

Tests:

Array.prototype.concat
var params = [ "hello", true, 7 ]; var source = [ 1, 2 ] var other = source.concat(params);
spread operator
var params = [ "hello", true, 7 ] var source = [ 1, 2 ] var other = [ ...source, ...params ]
Push
var params = [ "hello", true, 7 ]; var source = [ 1, 2 ] var other = source.push(...params);

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Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.concat
spread operator
Push

Fastest: N/A

Slowest: N/A

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

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Let's break down the provided benchmark and explain what is tested, the options compared, their pros and cons, and other considerations.

**Benchmark Overview**

The `Array concat vs spread operator vs push - V2` benchmark compares the performance of three different approaches to concatenate arrays in JavaScript:

1. `Array.prototype.concat()`
2. The new ES6 spread operator (`[ ...source, ...params ]`)
3. The `push()` method with the spread operator (`source.push(...params)`)

**Test Cases**

There are three test cases:

1. **`Array.prototype.concat`**: This test case uses the traditional `concat()` method to concatenate two arrays.
2. **`spread operator`**: This test case uses the new ES6 spread operator to concatenate two arrays.
3. **`Push`**: This test case uses the `push()` method with the spread operator to concatenate two arrays.

**Library and Syntax**

The test cases use the following libraries:

* None, only built-in JavaScript features are used.

There is no special JS feature or syntax used in this benchmark.

**Options Compared**

The benchmark compares the performance of three different approaches to concatenate arrays:

1. `Array.prototype.concat()`: A traditional method that creates a new array by concatenating two existing arrays.
2. The spread operator (`[ ...source, ...params ]`): A new ES6 feature that allows creating a new array by spreading elements from an existing array and adding them to another array.
3. `push()` with the spread operator (`source.push(...params)`): A method that adds one or more elements to the end of an array, using the spread operator to concatenate the arrays.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

1. **`Array.prototype.concat()`**:
	* Pros: Simple and well-documented.
	* Cons: Creates a new array object, which can be inefficient for large datasets.
2. **Spread Operator (`[ ...source, ...params ]`)**:
	* Pros: Creates a new array without modifying the original arrays, and is more concise than `concat()`.
	* Cons: May have performance issues if dealing with very large datasets or complex data structures.
3. **`push()` with Spread Operator (`source.push(...params)`)**:
	* Pros: Modifies the original array in-place, which can be more efficient for modifying existing arrays.
	* Cons: Returns `undefined`, and can be less readable than using `concat()`.

**Other Considerations**

When choosing an approach to concatenate arrays in JavaScript:

* If you need to create a new array without modifying the original arrays, use the spread operator.
* If you need to modify an existing array in-place, use `push()` with the spread operator.
* If performance is critical and you're dealing with large datasets or complex data structures, consider using other optimization techniques.

**Alternatives**

If you don't want to benchmark the JavaScript concat() method, here are some alternative approaches:

1. Use a library like Lodash's `_.concat()` function.
2. Create an array copy using `Array.prototype.slice()` or `Array.prototype.splice()`.
3. Use a different programming language or framework that provides a more efficient way of concatenating arrays.

Keep in mind that the best approach will depend on your specific use case and performance requirements.

Related benchmarks:

Array concat vs spread operator vs push - V2 (version: 0)

Compare the new ES6 spread operator with the traditional concat() method and push

Comparing performance of: Array.prototype.concat vs spread operator vs Push

Created: 4 years ago by: Guest

Jump to the latest result

Array.prototype.concat

spread operator

Push

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):